/*
 * Copyright 2011-2020 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.data.gemfire.listener;

import org.apache.geode.cache.query.CqEvent;

/**
 * Continuous Query (CQ) listener listening for events and notifications by a GemFire Continuous Query (CQ).
 *
 * @author Costin Leau
 * @author John Blum
 */
public interface ContinuousQueryListener {

	/**
	 * Action performed by the listener when notified of a CQ event.
	 *
	 * @param event the event from the CQ.
	 * @see org.apache.geode.cache.query.CqEvent
	 */
	void onEvent(CqEvent event);

}
